Fireproof door



Nov. 3,1925

C. C. PFEIFFER nnEPRooF Doony Filed may 2s, 1924 2 Sheets-Sheet I C. C. PFEIFFER Nov. 3 1925- FIREFROOF DOOR Filed llay 23., 1924 -2 Sheets-Shet 2 www 3215er Patented het.

UNITED STTES PATENT caries..

CHARLES C. PFEIFFER, 0F WESTFIE'LD, NEVI JERSEY, ASSIGNOR 'I O KNOBUR'N'PROD- UCTS CORPORATION, OF HOBOKEN, NEVI JERSEY, A CORPORATION OF NEW JERSEY.

FIREPROOF Doon. i

Application filed May 23,

ATo all whom t may concern.'

f Be it known that I, CHARLES C. PFEIFFER, a citizen of the United States, and a resident of Westfield, county of Union, and State of New Jersey, have invented certain newv and useful Improvements in Fireproo't Doors, of which the following is a specification.

This invention relates to doors and particularly to reproo'f doors of the type in which a wooden core or body is covered with a metallic sheathing.' V

The invention has ior its salient object to provide Ya door construction of the type specified that will be strong and serviceable and can be manufactured at a minimum labor cost.

Another object of the invention is to provide a door structure havingV the metallic vcovering so mounted and secured over the Vcore or body that the several parts of the covering or sheathing can be easily and 'readily connected together and will Vbe securely held in posit-ion;

Further objects of the invention will appear from the following description taken in connection with the drawings which form a part of this application and in which,

Fig. 1 is'an elevational view of a door constructed in accordance with the inven-` tion.' Fig'. 2 is a longitudinal sectional elevation ot' the structure shown in Fig. 1.

Fig'. 3 shows the construction of the core or body of the door and one' method of securing the parts together.

Fig. 4 is an enlarged detail section taken substantially on line 4 -4 of Figs. 2 and 5.

Fig. 5 is a detail sectional elevation taken substantially on line .5 5 of Figs. 1 and 4t.

Fig. 6 is a sectional elevation taken substantially on line 6-6 of Fig. l.

Fig. 7 is a sectional elevation taken substantially on line 7 7 of Fig. 1, but showing the construction on' an enlarged sca-le.

Fig. 8 is a 'perspective detail view showing the construction of a corner between one' of the stiles and -a rail, the parts being shown separated for clearness.

Fig. 9 isaperspective elevation pf the structure shown inFig. 8, the various parts being shown as joined together.

Fig. lQshows he v*constructionof` the` 1924. Serial No. 715,270.

sheathing or metallic .covering for thedbase shown in Figs. 8 and 9.

Fig. 11 is a perspective elevation showing the metallic sheathing` for one of the stiles. Fig. 12 is a perspective elevation showing the sheathing for one of the rails. 1

Fig. 18 is a perspective elevation showing one of the connectors for joining the sheathing of a stile and a rail, and r Fig. lllis a sectional elevationtaken sub jstantially on line 14-14 of Fig'. 1.

The invention brieiiy described consists oi a door comprising a woodencore or body, p

the body being covered by a metallic sheathing. The sheathing is formed of rseveral sections which are bent to shape and are then superimposed on the body, the various parts or.. sections of the sheathing beingy .The stiles 20 as shown particularlvin Fig.

8 are recessed at 28 at their ends. The ends 2,4 of the rails 21 lit in the recesses 23 and these ends 24 are in turn recessed-'as shownA at 25. Additional cross members 26 are secured to the rail and to the stiles and these crossV members `ha-ve groovesr 27 formed therein alined with the recessed portionsQLl of the lrails 2.1. The members 26 also have tending inwardly therefrom. The ends of,

the lshea'tlis 35 are 'cut away andportions of these ends are folded inwardly' or back on Lll) . posed pesition wi 41 of the sheath 4).` These metallic flanges ",tratled partieul .,,a rectangular hollow sheath 40 having lianges 41 and at its ends inwardly folded portions 42 (see Figs. ,and The portions 42 alsoform channels for a lpurpose hereinafter set forth. rihe wall 43 of the sheath 40 is recessed or cut away as shown at 44 to provide for the insertion of the connecting member which connects together the sheath 40 and the sheath 35. The wall 43 also has extensions 45, one at each end thereof for reasons vhereinafter set forth.

The metallic covering for the door is rmounted thereon in the following manner. The sheaths and 40 are spread or opened suiciently to permit their being placed over the stiles and rails of the door. Referring particularly to Fig. 10 it will be seen that one of the sheaths 35 vhas been mounted on a stile and that the .inturned yportions 37 thereof are disposed in the recess 25 of the rail 2l and in the groove 27 ofthe member 26. The sheath has also been mounted over the rail 21 and member 26 and has its inturned 4portions 42 disposed in the recess 25 and groove 27. The connector illustrated particularly in Fig. 13 is used to connect together Vthe sheath 35 and sheath 40. This connector comprises a piece of material hav- `ing its ends folded over toward each other but spaced apart as shown at 51. -There are thus formed channels 52 and 53 between the portions 50 and the main or body por- .tionY of the connector.r This connector is then inserted in the slot 44 formed in the wall 43 ofthe sheath 40 and secures together the portion 37 of the `sheath 35 andy the portion 42 of the sheath 40. 'lt -will be understood that connectors are usedlat both sides of the sheath as clearly illustrated vin Fig. 10.

Then the sheaths have been so mounted the portions 45 of the sheath 40 are forced nto Vthe groove 23 of the 'member 26 as shown particularly in Fig. 5. The portions 38 of the sheath 35 are then bent bach A`upon themselves and forced into the channel formed in the extension 45.

Panels may be secured in any desired manner and `one method of securing the panels is illustrated in Figs. 6 and 14. ln Figli the panels are snown `as having a wooden `oorel having a metallic covering 62, the two vends' of the covering being er;- teneled beyond the core and placed yin juntath -referenie to the anges and extensions can-then be secured-together in any desired manner by spot welding and if desired, for ornamental purposes, fillers' vthe rail sheaths and the stile sheaths as shown in Figs. 8, 9 and 10. From these figures it will be seen that the connections between the sheaths overlap the connections between the rail and stile thereby increasing the rigidity and ruggedness of the construction, and furthermore lby `reason yof the vvarious overlapping parts the joints are made much more firm and effective. 'It will be understood that the exposed joints such as 'the connections between the connector and the inturned portions of the sheaths will be filled in with lead, solder or lother suitable material so that in the finished door `no joints will be seen.

Although one specific embodiment of the invention has been particularly illustrated and described, it will be understood that the invention is capable of modification and that changes in the construction and inthe arrangement of the various cooperating parts may be made without vdeparting from `the spirit or scope of the invention asexpressed in .the following claims.

r`What claim is:

1. In a structure of the character described, a -pair of body members joined together at an angle to each other, a metallic sheath encasing each body member, said sheaths having portionsdisposed in abutting relation and a connector joining the abutting portions and disposed .e within the sheaths, one of said sheaths overlapping the joint between `said members.

2. ln a door structure, a stile, a rail secured thereto and having a groove in the outer wall thereof, a. sheath encasing said rail andD having an extension disposed in said groove and a sheath encasing said stile and having portions extending around the end of the rail and disposed in said groove.r

l 3. In a door structure, a stile, a rail secured thereto and/having a groove .in the olii-ter vwall thereof, a sheath. encasingl said rail and having an extension disposed in said groove and a sheath encasing said stile and having portions extending around the end of the rail and disposed in said groove and engaging said extension. l

4. In a door structure, a body member, a second body secured Vthereto at an angle with respect thereto, one member having a llongitudinal groove therein, a sheath encasing one'inember and having an extensie-nin said groove, a sheath enea-sing Ithe other inember and having portions engaging saideX-tension and disposed in said groove. .j Y, 5. In a door structure, a body member,4 a

secondfbody member secured thereto at an'- voV CII

angle With respect thereto, one member having a longitudinal groove in its outer sui'- face, a sheath encasing one member and having an extension pressed into said groove and a sheath encasing the other member and having portions overlapping said first member and pressed into the groove in superimposed relation with respect to the eX- tension in the other member.

6. In a door structure, a stile, a rail secured thereto, and having a groove in one side Wall, the connection between the stile and the groove being located in a position oifset from the inner edge of the stile, a sheath encasing said stile and having yportions overlapping the rail, a sheath encasing the rail and having portions abutting the stile sheath, and connectors securing together the abutting edges of the stile sheath and the rail sheath.

7. In a door structure, a stile having a recess at one end thereof, a rail secured to said stile and having its end disposed inv the recess of the stile, a sheath encasing the stile and having projecting end portions eX- tending around the rail, a sheath encasing the rail and having an extension disposed Within the end portions of the stile sheath and means for securing said sheaths together.

8. In a door structure, a stile, a rail secured thereto and having a groove in the outer Wall thereof and grooves in the side surfaces thereof, a sheath encasing the rail and having an extension'disposed :in the groove in the outer Wall thereofand having edges bent back upon themselves land dis` f posed in the grooves in the side vsurfaces thereof, a sheath encasing the stile having portions extending aroundthe rail and disposed in the groove in the outer edge thereof, said stile sheath also having edges bent back upon themselves and disposed in the grooves in the side surfaces of the rail, and means disposedin the grooves in the side surfaces of the rail connecting the portions of the rail sheath` and stile sheath disposed in said grooves.

yIn Witness whereof, I have hereunto setv 

